CVE-2026-122146: 101arrowz fflate index.mjs unzipSync memory corruption
A weakness has been identified in 101arrowz fflate up to 0.8.3. This issue affects the function unzipSync of the file esm/index.mjs. This manipulation causes memory corruption. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Event History
Frequently Asked Questions
Which deployments are exposed to this issue?
Deployments using 101arrowz fflate version 0.8.3 or earlier and invoking unzipSync from esm/index.mjs are affected. The issue can be initiated remotely.
What does an attacker need to exploit it?
The listed attack vector is network-based and requires neither privileges nor user interaction. Public exploit code is available, increasing the likelihood of attempted exploitation.
Is a vendor fix available?
The provided information does not identify a fixed version or vendor remediation. It states that the vendor was contacted but did not respond.